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What is Dynamic Hazard?

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  • Last Updated : 20 Mar, 2022

When the output changes more than once as a consequence of a single change in its input, which is referred to as “dynamic risk.” The presence of dynamic risks is common in bigger logic circuits when there are several pathways to the final output state (from the input). While the output changes for two nearby inputs instead it should only change once, this is referred to as dynamic hazard. The presence of dynamic risks is common in bigger logic circuits when there are several pathways to the final output state (from the input). Once it is established that each route has a distinct delay, it becomes immediately apparent that there is the possibility for output values to change and diverge from the needed/anticipated output.

Detection of Dynamic Hazard:

When the output changes numerous times, the value should only move from 1 to 0 or 0 to 1 once. This is referred to as a dynamic hazard in mathematics. When the output changes for two neighboring input combinations at the same time, this is referred to as be a dynamic hazard. However, the output should only change once. Dynamic hazards are a sequence of changes in the state of a signal that occur numerous times in succession while the signal is supposed to change status only once. It is possible for the output to change more than once as a consequence of one change in its input, which is referred to as “dynamic risk.”

Example: An intended logic circuit changes the output state from 1 to 0 but instead changes the output state from 1 to 0 then 1, before eventually resting at the proper value of 0. This is an example of a dynamic danger. The resolution of dynamic hazards is more difficult in general, however, it is important to remember that if all static hazards have been removed from a circuit, then dynamic hazards cannot emerge.

Dynamic Hazard

Dynamic Hazard

Elimination of the Dynamic Hazard

In general, the term “dynamic” refers to anything that is energetic, capable of action and/or change, or powerful. Only multilayer circuits are susceptible to dynamic dangers. It is difficult to resolve a dynamic danger. It may be avoided entirely by using duplicate gates.

In the workplace, elimination is the process of eliminating a Dynamic hazard from the work environment. It is the most effective method of risk management since the danger is no longer present in the environment. In most cases, it is the most effective method of hazard management and should be employed whenever practicable. The last word on dynamic risks: it should be emphasized that if all static hazards have been removed from a circuit, then it is impossible for dynamic hazards to exist from the circuit.

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